Trolley-pole controller.



- v No. 779,401

PATENTED JAN. 8, 1905. A.- W. HARRISON & E. H. POSDIGK.

' TROLLBY POLE CONTROLLER.

APPLICATION FILED JUNE 2, 19,04.

| vEHToRo yr m.-"( w Z94 4 BY wheel upon the feed-wire This pipe is insulated from the base by insu- 535 Unrreo Patented January 3, 190i.

LOS ANG FILES,

IALEFORN i.

TRCLLEY-FOLE GONTFEQLLER.

SPECIFICATIGN forming part of Letters Patent No. $79,401, dated January 3, 1995.

To all whom 1'15 71mg concern.-

Be it known that we, Airmen -W. .iaiznij SON and EUGENE H. FOSDICK, citizens of the United States, residing at Les ih'igeles, in the county of LosAngeies and State of California. haveinvented new and useful improvements in Trolley-Role Controllers, of which the foll lowing is a specification.

Our invention relates to controllers for trolley-poles used with an overhead feed-wire; and the object thereof is.to provide means whereby the troliey-wheel will be held in en- Q gag'ement with the overhead feed-wire with a l constant and uniform pressure of the trolleyand when tho'troli icy-wheel accidentally leaves the wire will cause tl e same to fall beiow the span-wires. We accomplish this object by the mechanism shown herein and illustrated in the accmnpanying' rawing's, in which-- Fig .-:e 1 is a diagrammatic View, with certain the parts in elevation and certain of l the parts in central vertical section, of the base and lower portion. of the troiley-pcdc. f Fig. 2 is a side elevation of a part of the upper portion of a irlOllQfffiDQiG and portion l of the feed-wire. Fig. 3 shows a throeway valve.

In the drawings, A is the base-l dock. which is secured upon the top oi the car. (N hown.) in the center of this block is a circuin. airl chamber B,whioh is connected by pipe 3 with a suitable.connn'cssod-air su pply. (Not shown. i

lation C. in this air-eluunber is a soft-iron plunger 1), which forms the plunger of the compound-wound solenoid-magnet E. which has a section E of the core on which the wire is wound of bronze. The section E is made of bronze or other non-magnetic material to separate the pole- 'iieces. This plunger has a hollow cylindrical chamber F therein. the lower end of which tapers to a point. so as the plunger is raised in t'n' magnet to power thereof may be uniform. in this chain-- her is mounted a spiral spring H. which bears against a follower i, mounted in the chamber. This follower supports the pitnian-rod to the hinged ring whose upper end is pivotally connec ed at n:

Application filed June 2,1904:- Serial lie. 210,851-

to the trollov-polo ii. pivoted at l to the cap 2,

The trolle \,'-pole is which cap is boiled that passes under the liangc i i of tho o1cm id-core. 'lhoso flanges form a bail-race in which are bulls i, which provide a bail-bcaring joint between the cap and solenoid. 'iho pifinan is secured from separation from the plunger by a plate hi. socured to the plunger. through which plate it passes. the rounded head .l preventing it from passing through said plate. hiagl'ict it has a winding N, which isci'innccted in series to the motor 0 by line l. The magnet is also provided. with a slumt-whuling Q, which is counectcd to the core at 5 and by line (i with ground w. 'ihe'upper nd of the trolley-pole is provided with the ordinary trolley-wheel 1%, which engages the feedwirc S, and the supplemental contact-wl1eel 'l, which also engages thcfoed-wire. Th is supplemental wheel is carried by an .-shapod arni U, which is pivoted to hearinghrin V, which arm is'insula'ted from the pole by insulation d. This arm is connected, through line X. haying resistance Y therein, tthe iroliey-pole. A. spring a, con nectod to m U and bearing-arm V, holds this wheel-spr pressed against the wire. The motor is connected by line 6 to ground (1. The other end of the series winding is connooted by line 1/ with the base. Non-il'uluctivc resistance is connected across the shuntwinding to prevent inductive l icl when the trolley-wheel accidontaily leaves the l'eod wire.

in the operation of our device the compressed air is turned into the aircha1nber it by means of the three-wayvalvefon pipe C, which valve is located at a convenient position to be operated bythe conductor or motorinan, and by means of the ordinary rope r the trolley-wheois are guided to the feed-wire. As soon as the wheels are on the feed-wire the ji'nngnet energized, and thcair is then cutofl' at the valve and chamber .8 opened to the atmosphere. Thereafter as long as the wheels are in contact with. the feed-wire pressure maintained between them by the magnet. When the motors are not being-operated, the current through the series winding is out off their own weight, as oonnterlmleneii 1-o which is p lueed by the magneiisufof Zheshunu-win lg; but as soon as l 1:

sure incl seri swinding.

11 3459 having-en air-chamber therein esoienoid- "magnet secured to suid base; a plunger for said magnet projecting into and forming a piston in said air-chamber; s cap rotstive upon said negnet; a trolley-pole plvobally secured to ,3

said capes pitmen pivotslly secured to said trolley-pole encfoperaluvely connected to the megnehplungei'i 2. A. trolley-pole controller cofiiprising a base having" an air-chamber therein; a, solenoid-magnet having a series winding running throu l the 2?)"(7012 to the ground and e shun? winds 5 runnu so ,1 med, said. megi'zei being secured toseid has ie; :2 plunger lisving a chamber in the upper; end thereof for said magnet, said plu n r prujeutin into and forming a piston in said .ir-chemher; e esp rote lively secured upon said magnet; e trolley pole pivomlly SBCUTBCl to said esp; a. pitmen pivotell, secured to the smiley-pole and up eratively eounected to she magnet-plunger.

" 2 pressure between the 3. A trolley-pole controller omprising; a base hsving en 1i*(!l"d'inw61llileffiilflML solenoidinsgnet having a: series end a, shunt winding;- secured to said huse; u plunger for said meg net projecting into and. forming a, piston in said air-slumber; e eeu relatively secured upon said magnet; 21 trolley-pole pivot-ellysecured to said cap; a. trolley-wheel on the end of said pole; a supplemental contact-wheel secured to said pole near the end thereof and insulated therefrom; a. line having resistance therein connecting the supplemental contactwheel with-said pole; a pitmen'pivotelly secured lo'seid trolley-pole and operetively conneoted to the magnet-plunger.

4. in trolley-pole conlsrnller in which the pressure of atrolley-wheel upon thefeed-wire is ems-ed by magnetic force, u supplemental couieetevheel secured in the irolley-pole near the end thereof and insulated therefrom; a line having resistance therein connecting said so pplementzil contact-wheel with said trolleypole. I

In a trolley-pole controller in which thebrolley-wheel is held in contact; with the feedwire by magnetic force a solenoid-mdgnet hav- G. E. HARPHAM,

HENRY T. HAZARD. 

